A181651 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 2 | | 1 | | 1 |
| | | | | | | | | 3 | | 1 | | 1 | | 1 |
| | | | | | | | 6 | | 2 | | 2 | | 1 | | 1 |
| | | | | | | 9 | | 3 | | 3 | | 1 | | 1 | | 1 |
| | | | | | 18 | | 6 | | 6 | | 2 | | 2 | | 1 | | 1 |
| | | | | 27 | | 9 | | 9 | | 3 | | 3 | | 1 | | 1 | | 1 |
| | | | 54 | | 18 | | 18 | | 6 | | 6 | | 2 | | 2 | | 1 | | 1 |
| | | 81 | | 27 | | 27 | | 9 | | 9 | | 3 | | 3 | | 1 | | 1 | | 1 |
| | 162 | | 54 | | 54 | | 18 | | 18 | | 6 | | 6 | | 2 | | 2 | | 1 | | 1 |
|
A181651 as a square array
| 1 | 1 | 2 | 3 | 6 | 9 | 18 | 27 | 54 | 81 | 162
| | 1 | 1 | 1 | 2 | 3 | 6 | 9 | 18 | 27 | 54
| | 1 | 1 | 2 | 3 | 6 | 9 | 18 | 27 | 54
| | 1 | 1 | 1 | 2 | 3 | 6 | 9 | 18
| | 1 | 1 | 2 | 3 | 6 | 9 | 18
| | 1 | 1 | 1 | 2 | 3 | 6
| | 1 | 1 | 2 | 3 | 6
| | 1 | 1 | 1 | 2
| | 1 | 1 | 2
| | 1 | 1
| | 1
|
A181651 as an upper right triangle
| 1 | 1 | 2 | 3 | 6 | 9 | 18 | 27 | 54 | 81 | 162
| | 1 | 1 | 1 | 2 | 3 | 6 | 9 | 18 | 27 | 54
| | | 1 | 1 | 2 | 3 | 6 | 9 | 18 | 27 | 54
| | | | 1 | 1 | 1 | 2 | 3 | 6 | 9 | 18
| | | | | 1 | 1 | 2 | 3 | 6 | 9 | 18
| | | | | | 1 | 1 | 1 | 2 | 3 | 6
| | | | | | | 1 | 1 | 2 | 3 | 6
| | | | | | | | 1 | 1 | 1 | 2
| | | | | | | | | 1 | 1 | 2
| | | | | | | | | | 1 | 1
| | | | | | | | | | | 1
|
|
